John bebqsten



J. BERGSTEN July 12, 1927.

ELEVATOR Ressued July 12, 1927.

STS-

F:TET OFFICE.

This invention relatos to elevators for raising and lwering. rod's,- tubing, well Casings, and the like. i

. Aun object of the present invention is the 8 provision of a positive lock to hold the elevator' in closed. position, when a tool or other Irticle isbeing raised or lowered.

Afifurthbr object of the inventin is the provisin of. means for retaining the elevator l0 i' ope'n% position to= peimit ready insertion of a tool or other article;

The looking mechanism is provided with oprating means n'ormally retained in locked position by.m\aans of a spring and adapted to be" retained in open: position when the elevator is opened against the tension of the sp'ring.

I*t is another object of this i'nvention to provide an elevator with a single means for m holding. it open and: closed.

Another object of,my invention is to provide an elevator which is automatically set in' the;opbn and closed positions and is freely operable between such.positihs.

A .furthr object of this invention is to provide: an elevator with a looking member adapted top1oject a substantial distance into the. work receiving. passage in the body andxmens whreby the lockin'gnmember is held ont of said passage when the elevator is .nother object is to provide certain practicatand effective improvements in the formation and rela'ti'oning of parts in an elevatr;-

fu1therob}ect ofthis invention has been to provide' an levator locking pin of improved construction-and opera-tion.

The objects," fetures and -advantages of mypresent invntioh will be best and more fully understood from: considrationof the follbwing' specificatiori when read with reference to the ccompafiying drawings, which specification and drawings set f0'rth*a typical form and embodiment of the invehtion, in

Which drafivings- Fig. 1 is a front elevation:

Fig; 2 is a vertical sectionalaview,

F 3 is a horizontal sectional view on lire'33 of Figure 1, showing the devicein closed position, amd, A

Fig. 4 is a similar view showing the dev1ce in bpbn*positiom= The elevator includestwo main parts hinged together or piv otally connected to releasably engage around a rod, a pipe, or the like. the present case one ,prt is in the form of a body 1, and the other is in the form of -a olosure or gtipping member 6. The body has a vertical slot or passage 2, extending into it from its front side to receivethe rod or pipe to be handled by the tool: The passage 2 extends inwardly to aboutthe center of the body Where its inner end is curved or founded to correspond to the crvature of the rod or pipe. The passa'ge divdes the front portioi1 of the body, so that the body is in the form of a U. A recess 3' extends laterally into the body from the passage at a point about mid'way between the top and bottom of the body. The recess has a portion 4;,whieh extends to and is open a,t the rear of the body. In one side of.the body the recess -stops before .reaching: the front of the body leaving awall 5. A

The closure or gripping member 6 is pivotally mountedin the recess on a vertical pin 7 arranged in the recess. The member 6 has a cut out portiori or recess 8 extending into it from one side and adapted torceive a'rodor pipe arranged in thepssage 2 of the body. The parts of the member 6 at the sides-of the recess8orm-jaws 9 and 10.

A looking menber 11 isprovided for c0- operationwith the member 6 and is shown located at the inner side of the wall- 5 I have shown the locking member inthe form of ahollow.pin arranged in an opening in the body; The lockingfimernber may be arranged in the opening from: the exterior of the body: The pin carriesspring 13 which be:rs against a plate arranged to close the outei end of the opening in the The spring normally projects the looking membjer to the position shown in Fig. 3 of,the drawings; The rear face of the, looking member is provided with a lug 14 adapted to be received in aforked end of a leve'r 15 which is pivotally mouhted in the-recess 3 on a pin 1 6". The rea'r end of this leve-r extends; through the opening 4: and forms a plug 20 normally closes the opening and shape, size, and arraugement of parts may a spring 21 is arranged between the plug .be resorted to without departing from the and plunger. The threaded plug is provided with a longitudinal opening for the reception of the rear end of the pin 18 formmg a guide therefor. The other end of the pin projects through wall 22 of the reoess ln the body and engages the lever 15.

Suitable trunnions 23 may be arranged on each side of the body portion, and these trunnions are adapted to be received in bearings 24 formed on the lower ends of arms 25 ot a bail or support Which may be of the usual type.

In operation, a rod, tubing, well oasmg or other object or piece of work A, when carried by the elevator islooatsd in the inner.

part of the passage 2 and is supported by the elevator through a projection or flange B provided on the object A. The object or work A is held against lateral displaoement from the passage 2 by the looking member 11 holding the closure member 6 in the position shown in Fig. 3. The bod 1 and member 6 are so related that the aw 10 of the member 6 extends across the passage in front of the work when the work is in position in the passage 2. The looking member projects a substantial distance over or in front of the aw 10 to positively lock it 1n the closed position. When the work is to be removed from the elevator the looking member is retracted against the resistance of Springs 13 and 21 by proper movement of the lever 15. As the work moves outwardly through the passage 2 it operates on the jaw 10 of the closure 6 to move the olosure to a position such as is shown in Fig. 4, The looking member remains retraoted or out of the passage while the work is being removed and engages the jaw 9 of the clo sure 6 to hold the closure in the open position when the work is out of the passage.

The aw 9 operates to hold the looking mem ber retraoted so that it does not project into the passage to interfere with passage of work into the elevator and the looking member operates to yieldingly hold the closure 6 in the open position ready to receive another piece of work. Vork being arranged' in the body 1 engages the jaw 9 to release it from the looking member and to move it inwardly so that the closure automatically moves to the closed position where it is automatically locked by the member 11.

The pin 18, bearing against the lever 16 also places the spring 21 under tension when the device is in open position and insures proper olosing of the looking member when desired.

It is to be understood that the form of the invention herewith shown and described is to be taken as a preferred example of the same, andthat various changes in the spirit of the invention or the scope of the subjo1ned claims.

Having described my invention, I claim:

1. An elevator comprising a body portion having a vertical passage and a lateral recess, a gripping member pivotally mounted in said reoess, said gripping.member being 3rovidedwith a cut-out portion adapted to aline with said passage, and a looking device comprising a laterally movable bar adapted to retain said member in open or closed position.

2. An elevator comprising a body portion having a vertical passage and alateral reoess, a gripping member pivotally mounted therein, said gripping member being provided with a cut-out portion, a looking device comprising a laterally movable bar adapted to retain said gripping member in open or closed position, and a spring to retain said bar in operativo position.

3. An elevator comprising a body portion having a vertical passage and a lateral reoess, a gripping' member pivotally mounted in the reoess, said gripping member being provided with a reoessed portion, a spring pressed looking member mounted in the body and normally engaging said gripping member to retain it in either of two positions, and a pivoted lever engaging said looking member.

4. An elevator comprising a body portion having a vertical passage and a lateral reoess, a gripping member pivotally mounted in the recess, said gripping member being provided with a recessed portion, a spring pressed looking member mounted in the body r and normally engaging said gripping member to retain it in either of two positions, a pivoted lever engaging said looking member, anda spring pressed pin engagng said lever to n0rmally maintain said looking member in operat1ve position.

5. An elevator including, two work holding parts connected for one to swing horizontally with relation to the other between a closed position and an open position, and a single spring actuated member for hold ing the parts against relative movement when in said positions. 6. An elevator including, two work hold ing parts connected for one to swing horizontally with relation to the other between a position wheretheparts are open and a position where the parts are closed, means whereby the parts are automatically closed upon application of work thereto and means other than the frictional resistance of the connection between the parts for holding the parts in both the open and closed positions.

7. An elevator including, two work holding parts connected for one to swing horizontally with relation to the other between a closed position and an open position, and means for holdingthe parts against relative movement when in said positions, said parts and means being related so that the parts are free of said means while moving between said positions.

8. An =elevator including, two work holding parts pivotally connected for one, to swing with relation to the other between a position where said parts areopen and a position where said parts are closed, said part havin two jaws, one whereby it is automatical y moved to a position where the parts are closed upon application of work to the parts and another whereby it is auto:

.matically moved to a position where the with the lever normally holding it in position where said member is in operating p0- sition.

10. An elevator including, a body having a work receiving opening, a closure adapted to retain work in the opening, a looking member for the closure normally projecting into the opening, and means whereby the looking member is held out of the opening when the closure is open.

intothe opening, and a part on the closure operating to hold the looking member out of the opening when the olosure is open.

12. An elevator including, two work holding parts/connected for one to swing with relation to the other between a position where the parts are open and a position where the parts are closed, and a single spring actuated member operable to positiv-ely hold the parts in the closed position and to yieldingly hold the parts in the open position.

13. An elevator including, two work holding parts connected for one to swing horizontally with relation to the other between a position where the parts are openand a position where the parts are closed, means whereby the parts are automatically closed upon application of work thereto, and means operating to automatically positively lock the parts in closed position when moved thereto and to hold them in open positi0n when moved thereto.

14. An elevator comprising a body having a vertical passage and a lateral recess, a member pivotally mounted in the recess having a recessed portion cooperating with the passage of the body, and a spring actuated looking member normally engaging said gripping member to retain it in either of two positions.

JOHN BERGSTEN. 

